漏洞信息
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Vulnerability Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libxfont2 name length mismatch
Vulnerability Description
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 byte stack buffer but libXfont2's alias target name length is 1024 bytes. A font alias name between 257 and 1023 bytes causes the X server to copy that name into the undersized stack buffer without further checks. This may be used to crash the server, or for privilege escalation if the X server runs as root.
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability Type
栈缓冲区溢出
Vulnerability Title
X.Org X server和Xwayland 安全漏洞
Vulnerability Description
X.Org X Server是X.Org基金会的一款X Window系统显示服务器。Xwayland是Xwayland开源的一个通信协议,规定了显示服务器与其客户机之间的通信方式。 X.Org X server和Xwayland存在安全漏洞,该漏洞源于X服务器与libXfont2库之间最大字体名称长度不匹配导致栈缓冲区溢出,可能导致服务器崩溃或权限提升。
CVSS Information
N/A
Vulnerability Type
N/A